Drop Window for Playground

gistfile1.txt

import Foundation
import Cocoa
import XCPlayground

public let DropNotification = "DropNotification"

public class DropWindow : NSWindow {
    required public init?(coder: NSCoder) {
        super.init(coder: coder)
        self.registerForDraggedTypes([NSFilenamesPboardType])
    }
    
    override public init(contentRect: NSRect, styleMask aStyle: Int, backing bufferingType: NSBackingStoreType, defer flag: Bool) {
        super.init(contentRect: contentRect, styleMask: aStyle, backing: bufferingType, defer: flag)
        self.registerForDraggedTypes([NSFilenamesPboardType])
    }
    
    public convenience init() {
        let screenFrame : CGRect! = NSScreen.mainScreen()?.frame
        self.init(contentRect:CGRectMake(screenFrame.size.width - 220,
            screenFrame.size.height - 80, 120, 80),
            styleMask: NSTitledWindowMask, backing: .Buffered, defer: false)
        XCPSetExecutionShouldContinueIndefinitely(continueIndefinitely: true)
        NSApplication.sharedApplication().setActivationPolicy(.Regular)
        self.makeKeyAndOrderFront(nil)
        self.title = "Drop Files Here"
        self.backgroundColor = .darkGrayColor()
    }
    
    public func draggingEntered(sender: NSDraggingInfo!) -> NSDragOperation {return NSDragOperation.Copy}
    public func draggingUpdated(sender: NSDraggingInfo!) -> NSDragOperation  {return NSDragOperation.Copy}
    public func performDragOperation(sender: NSDraggingInfo!) -> Bool {
        let pboard = sender.draggingPasteboard()
        let files: [String]! = pboard.propertyListForType(NSFilenamesPboardType) as? [String]
        NSNotificationCenter.defaultCenter().postNotificationName(DropNotification, object: files)
        return true
    }
}